pertinacity
American Heritage Dictionary:
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per·ti·nac·i·ty
(pûr'tn-ăs'ĭ-tē) 
n.
The quality or state of being pertinacious: "Again and again ... with the inexorable pertinacity of a child ... did he renew his efforts" (Nathaniel Hawthorne).
n.
The quality or state of being pertinacious: "Again and again ... with the inexorable pertinacity of a child ... did he renew his efforts" (Nathaniel Hawthorne).
Roget's Thesaurus:
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pertinacity
noun
- The quality or state of being stubbornly unyielding: bullheadedness, doggedness, hardheadedness, mulishness, obstinacy, obstinateness, pertinaciousness, perverseness, perversity, pigheadedness, tenaciousness, tenacity, willfulness. See resist/yield.
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Copyrights:
American Heritage Dictionary
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
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Roget's Thesaurus
Roget's II: The New Thesaurus, Third Edition by the Editors of the American Heritage® Dictionary Copyright © 1995 byHoughton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
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